<div class="panel panel-primary">
    <div class="panel-heading">NgModel的用法</div>
    <div class="panel-body">
        <p class="text-danger">ngModel只能用在表单类的元素上面</p>
        <input [(ngModel)]="currentRace.name">
        <p>{{currentRace.name}}</p>
    </div>
</div>
